Eggless Chocolate Sponge Cake, a simple sponge cake that can form the base for a variety of luscious desserts.Plain or fancy, a basic sponge cake can be employed to produce desserts for occasions ranging from a simple family meal to a show stealing birthday cake. Whatever the recipe, a basic sponge cake has to be moist, soft and tender. A dry, crumbly, flat cake will make the dessert very unappetizing.